CN112141849A

CN112141849A - Speed limiter assembly for elevator system, elevator safety system and elevator system

Info

Publication number: CN112141849A
Application number: CN201910566549.XA
Authority: CN
Inventors: 刘志仁
Original assignee: Otis Elevator Co
Current assignee: Otis Elevator Co
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-12-29
Anticipated expiration: 2039-06-27
Also published as: CN112141849B; US20200407193A1; US11453571B2; EP3757050A1

Abstract

The invention relates to a speed limiter assembly for an elevator system, an elevator safety system and an elevator system. The speed limiter assembly comprises a speed limiter and a linkage piece, the linkage piece is set to enable the speed limiter to be linked with a safety device of an elevator when an elevator car is overspeed so as to trigger the safety device to carry out safety treatment, the speed limiter comprises at least one torsion spring, the torsion spring is connected and arranged between a rope wheel in the speed limiter and a centrifugal mechanism and used for providing a preset load, and the centrifugal mechanism generates a centrifugal force which is larger than the preset load when the elevator car is overspeed so as to trigger the safety device through the linkage piece. The invention is easy to install, manufacture and maintain, can very conveniently and flexibly set and adjust the preset load of the spring in the speed limiter, and effectively enhances the safety and reliability of the elevator system.

Description

Speed limiter assembly for elevator system, elevator safety system and elevator system

Technical Field

The invention relates to the technical field of elevators, in particular to a speed limiter assembly for an elevator system, an elevator safety system and an elevator system.

Background

Elevators have gained quite extensive application in modern society, and can bring great convenience to the work and daily life of people. Numerous types of elevator devices, equipment or systems have been provided in the prior art to meet the needs of various applications. However, these existing elevator devices, equipment or systems still have drawbacks and deficiencies such as structural configuration, safety and reliability, manufacturing, operational performance, etc., and can be further improved and optimized.

Disclosure of Invention

In view of the above, the present invention provides a governor assembly for an elevator system, an elevator safety system, and an elevator system that can solve or at least alleviate one or more of the above problems and others.

First, according to a first aspect of the invention, there is provided a governor assembly for an elevator system, comprising:

a speed limiter; and

the linkage piece is arranged to enable the speed limiter to be linked with a safety device of the elevator when the elevator car exceeds the speed, so as to trigger the safety device to perform safety treatment;

characterized in that the speed limiter comprises at least one torsion spring which is arranged in connection between a rope sheave in the speed limiter and a centrifugal mechanism for providing a predetermined load, and that the centrifugal mechanism, when the elevator car is overspeed, creates a centrifugal force which is greater than the predetermined load for triggering the safety gear by means of the linkage.

In a governor assembly in accordance with the present invention, optionally, the centrifugal mechanism is mounted on the sheave for rotation therewith by at least one shaft, and at least one torsion spring is mounted on at least one of the shafts and has first and second ends connected to the sheave and the centrifugal mechanism, respectively.

In the governor assembly according to the present invention, the shaft is optionally provided with two or more, which are uniformly arranged along the circumferential direction of the sheave.

In the governor assembly according to the present invention, optionally, the shaft is installed on a side of the sheave facing the centrifugal mechanism, and a receiving portion for receiving the first end of the torsion spring is provided in an outer peripheral region of the shaft; and/or

A side of the centrifugal mechanism facing the sheave is provided with a receiving portion configured to receive the second end of the torsion spring.

In the governor assembly according to the present invention, optionally, the housing is configured as two or more bore grooves arranged along a circumferential direction of the shaft; and/or

The first end is configured to have an operating portion configured to be capable of disengaging the first end from the accommodating portion by operating the first end after being accommodated in the accommodating portion.

In a governor assembly according to the present disclosure, optionally, the bore slot is configured to have at least a first portion and a second portion, the first portion being different from the second portion in an axial direction and/or a radial direction of the shaft.

In the governor assembly according to the present invention, optionally, the first portion is farther from the centrifugal mechanism in the axial direction than the second portion and closer to a center axis of the shaft than the second portion in the radial direction, and the first end is configured to have a first section and a second section, the first section being accommodated in the first portion, the operating portion being provided on the second section and having an outwardly protruding portion after the second section is accommodated in the second portion.

In a governor assembly according to the present invention, optionally, the second end is configured to have an extension portion extending in an axial direction of the torsion spring, and the receiving portion is configured to be a hole for receiving at least a portion of the extension portion.

In a governor assembly according to the present invention, optionally, the sheave and the safety device are mounted on the elevator car.

In the governor assembly according to the present invention, the safety device is optionally a safety gear pulling mechanism, and the link is configured in an arm shape and connected to the safety gear pulling mechanism.

Further, according to a second aspect of the present invention, there is also provided an elevator safety system including:

a safety device arranged for safety handling when the elevator car is overspeed; and

a governor assembly for an elevator system as defined in any of the above arranged to trigger the safety when the car is over-speeding.

Further, according to a third aspect of the present invention, there is also provided an elevator system including:

a guide rail;

an elevator car moving along the guide rails; and

a governor assembly for an elevator system as defined in any of the above arranged to trigger safety devices of an elevator for safety handling when the car is overspeed.

The principles, features, characteristics, advantages and the like of various aspects according to the present invention will be clearly understood from the following detailed description taken in conjunction with the accompanying drawings. For example, the technical scheme of the invention is easy to install, manufacture and maintain, and the spring preset load in the speed limiter can be very conveniently and flexibly set and adjusted by adopting the technical scheme, so that the spring preset load is not limited by the internal installation space of the speed limiter, and can be set to be larger than the existing speed limiter, even can reach the limit of a torsion spring, thereby expanding the application range of the speed limiter, effectively improving the working performance of the speed limiter and obviously enhancing the safety and reliability of an elevator.

Drawings

The present invention will be described in further detail below with reference to the drawings and examples, but it should be understood that the drawings are designed solely for purposes of illustration and are not necessarily drawn to scale, but rather are intended to conceptually illustrate the structural configurations described herein.

Fig. 1 is a partial perspective view of an embodiment of a governor assembly according to the present invention disposed in an elevator system.

Fig. 2 is a perspective view of a portion of the governor assembly embodiment shown in fig. 1, showing a sheave and a centrifugal mechanism.

Fig. 3 is a side view of the portion of the governor assembly embodiment shown in fig. 2.

Fig. 4 is a schematic perspective view of a sheave in the portion shown in fig. 2.

Fig. 5 is a perspective view of an example torsion spring in the governor assembly embodiment shown in fig. 1.

Fig. 6 is a partial perspective view of the example torsion spring of fig. 4 mounted to an embodiment of a governor assembly.

Fig. 7 is another partial perspective view of the example torsion spring of fig. 4 mounted to an embodiment of a governor assembly.

Detailed Description

First of all, it is to be noted that the construction make-up, arrangement, features and advantages of the governor assembly for an elevator system, the elevator safety system and the elevator system according to the invention will be described below by way of example, however, all the descriptions should not be applied to form any limitation to the invention. In this document, the technical terms "connected (or connected, etc.)" cover the direct connection and/or indirect connection of a specific component to another component, and the technical terms "first" and "second" are used for the purpose of distinguishing and expression and are not intended to indicate their order and relative importance

Furthermore, to any single feature described or implicit in an embodiment herein or shown or implicit in any single feature or features shown or implicit in the drawings, the invention still allows any combination or permutation to be continued between the features (or their equivalents) without any technical barriers, and thus further embodiments according to the invention should be considered within the scope of this disclosure. In addition, for the sake of brevity, identical or similar components and features may be indicated in the same drawing only in one or several places, and general matters already known to those skilled in the art are not described in detail herein.

A general situation in which an embodiment of a governor assembly according to the invention is installed and arranged in an elevator system is schematically illustrated in fig. 1, and the structural arrangement and the like of the governor assembly embodiment are further illustrated in fig. 2-7, with which embodiment the invention will be described in detail below in connection with the drawings.

As shown in fig. 1, the governor assembly includes a first sheave 1, a second sheave 2, a link 3, a centrifugal mechanism 4, and a link 5, wherein the remaining components other than the link 3 are part of the governor. Of course, the present invention is not limited to the specific examples described herein for the governor in the governor assembly, and may take on many other structural configurations.

In the governor assembly, a centrifugal mechanism 4 is provided for providing centrifugal force, which can be installed on the first sheave 1, and both the first sheave 1 and the second sheave 2 are adjacent to each other and rotatably installed to an elevator car (not shown). For example, in the illustrated embodiment, the first sheave 1 and the second sheave 2 are Mounted on the base plate 7, thereby forming a governor assembly commonly referred to in the industry as a "Car Mounted governor". The base plate 7 can be made of any suitable material, such as sheet metal, and is attached to the elevator car for providing mounting locations for the first sheave 1, the second sheave 2, safety devices in the elevator (not shown), etc. Of course, in some specific application scenarios, it is also possible to mount the first sheave 1, the second sheave 2, etc. in the governor assembly at the top of the elevator hoistway, in other mounting locations in the machine room, etc.

In the embodiment shown in fig. 1, the rope 8 (e.g. using a wire rope or the like) can be fixed at the top of the elevator shaft and hang freely, and the rope 8 is kept taut by means of a weight at the bottom of the elevator shaft. As shown in fig. 1, when the elevator is in operation, the elevator car moves up and down in the elevator shaft by the traction force applied by the power unit through the rope 8, the rope 8 will pass through the grooves 14 on the first sheave 1 and the grooves 21 on the second sheave 2, respectively, and the second sheave 2 will be also referred to as "idle sheave" or "diversion sheave" or the like because other parts are not normally provided on the second sheave 2 and its rotation direction is just opposite to that of the first sheave 1, it is understood that the second sheave 2 may be removed and only the first sheave 1 may be used in some embodiments.

It is possible for the centrifugal mechanism 4 to be mounted on the first sheave 1 so as to rotate together with the latter. In practical applications, the centrifugal mechanism 4 may be implemented in any possible form. One or more weight members 41 may be provided in the centrifugal mechanism 4, as shown in fig. 2 for example, such a weight member 41 may be formed by mounting a plurality of pieces such as iron sheets, steel sheets, or the like one on another or using metal blocks or the like, for example, so as to thereby be able to generate a centrifugal force during rotation of the centrifugal mechanism 4 together with the first sheave 1. In an alternative case, several such weights 41 may be arranged uniformly in the circumferential direction of the centrifugal mechanism 4, in order to enable the centrifugal force to be distributed as uniformly as possible, preventing undesired vibrations, noise and damage to components due to uneven forces.

Referring to fig. 2 to 7 in combination, according to the design concept of the present invention, one or more torsion springs 9 may be connected between the sheave in the governor assembly and the centrifugal mechanism 4, and a predetermined load may be provided by the torsion spring(s) 9 according to the application requirements. When different application requirements are met, the preset load between the rope wheel and the centrifugal mechanism 4 can be set or adjusted quickly, conveniently, freely and flexibly in the above mode, which is completely absent in the mode of generally adopting a tension spring in the prior art, and detailed comparison and explanation are carried out on the preset load in the following so as to fully understand the aspects of the design idea, the technical advantages and the like of the invention.

By arranging the above-mentioned torsion spring 9 in the governor assembly, the centrifugal force created by the centrifugal mechanism 4 will overcome the predetermined load provided by the torsion spring 9 when the elevator car is in an overspeed state, i.e. the centrifugal force will be greater than the predetermined load, so that the linkage 3 can be actuated thereby to trigger the safety device to perform safety processes such as speed limiting, braking operations, etc. on the elevator car, which will be exemplarily described below in connection with the present embodiment.

As shown in fig. 1 and 2, a connecting element 5 associated with the centrifugal mechanism 4 can be provided, which can take any suitable form, such as a trip ring, a coupling gear, etc., and which is arranged such that the centrifugal mechanism 4 can connect the connecting element 5 with the first rope sheave 1 only when the elevator car is overspeed, since the centrifugal force provided by the centrifugal mechanism 4 has now exceeded the original preset load, so that the connecting element 5 can bring the link 3 connected thereto into motion and will thus trigger the safety gear for safety disposal. This is that, can realize the linkage of overspeed governor and safety device through linkage 3 this moment, trigger the safety device and begin work, can carry out safety control to the current overspeed condition of elevator car in order to reduce the movement speed of elevator car, make its complete braking etc. to can solve the safety problem that elevator car overspeed brought, in time guarantee effectively personal and property safety.

The safety device described above can be, by way of example, a safety gear lifting mechanism or any other mechanism, device or apparatus etc., and the linkage 3 can optionally be configured as an arm-like structure (or so-called rod-like structure) as shown in fig. 1, and its one end 31 can be connected to the safety gear lifting mechanism described above, e.g. by a connection such as a tension spring, in order to trigger the safety gear lifting mechanism for safety handling operations in the event of an overspeed of the elevator car.

As shown in fig. 2, 3, 4, etc., the centrifugal mechanism 4 may be mounted on the first sheave 1, for example, by one or more shafts 10, so as to be capable of performing a rotational motion along with the first sheave 1. In a specific application, the structural size, arrangement position, number, installation manner, etc. of the shaft 10 can be flexibly selected and set so as to better meet various requirements. For example, two or more shafts 10 may be provided and arranged uniformly along the circumferential direction of the first sheave 1. Fig. 4, for example, shows that 3 mounting holes 12 are uniformly opened in the circumferential direction on the side 11 of the first sheave 1 facing the centrifugal mechanism 4 for mounting one shaft 10 each, i.e. the shafts 10 are uniformly arranged at 60 ° intervals from each other in the circumferential direction of the first sheave 1.

In the given embodiment, the torsion spring 9 is fitted around at least one of the shafts 10, and the first end 91 of the torsion spring 9 is connected to the first sheave 1, while the second end 92 of the torsion spring 9 is connected to the centrifugal mechanism 4, more specifically to the weight member 41 of the centrifugal mechanism 4. Although in the exemplary embodiment shown only one shaft 10 is fitted over one torsion spring 9, it should be understood that in practice it is possible to fit two or more torsion springs 9 simultaneously on the same shaft 10, or it is also possible not to fit any torsion spring 9 on a certain shaft 10. The invention allows such a freely flexible arrangement to be fully adapted to the various possible requirements in different applications, and allows flexible design and adjustment of the type, configuration, number of arrangements, etc. of the torsion springs 9 themselves for different applications.

It is noted that, compared to the prior art, since there is no spatial arrangement limitation in the solution according to the invention, when the torsion spring 9 is mounted on the shaft 10, it can be made to have a relatively larger amount of pre-torsion, i.e. it is possible to provide a relatively larger spring pre-set load, which is of positive significance for sufficiently ensuring and improving the operational stability of the speed limiter, etc., and is of significant advantage especially for high speed limiters, etc., for example. The elevator safety device has the advantages that the larger spring preset load is arranged in the speed limiter, so that the elevator safety device is more stable and reliable in working, misoperation interference caused by abnormal behaviors of certain elevator passengers in an elevator car can be effectively avoided or eliminated, and the speed limiter assembly and the associated safety device can obtain higher reaction speed and the like.

Furthermore, due to the above-mentioned outstanding advantages of the present invention in terms of spatial arrangement, in some applications, a plurality of torsion springs 9 may be provided simultaneously on the same shaft 10, thereby providing sufficient redundancy to prevent safety risks due to failure or malfunction of one or some of the torsion springs 9 during operation, which is extremely beneficial for ensuring and significantly improving the safety reliability of the governor assembly.

In contrast, when the tension spring method commonly used in the prior art is adopted (i.e., the tension spring is used to connect the weight in the centrifugal mechanism of the speed governor), it is difficult to make the tension spring have a larger pre-spring tension amount due to the restriction of the structure of the tension spring and the internal space of the speed governor, and it is impossible to arrange a larger number of tension springs in the prior speed governor at the same time, so that the technical advantages provided by the technical solution of the present invention as discussed above cannot be achieved at all.

With continued reference to fig. 4, as an alternative, a receiving portion 13, for example in the form of a slot or the like, may be provided in the outer peripheral region of the mounting hole 12 (i.e., the shaft 10) for receiving the first end 91 of the torsion spring 9. As also shown in fig. 6, as an alternative, a receiving portion 43, for example in the form of a hole or the like, for receiving the second end 92 of the torsion spring 9 may be provided on the side 42 of the centrifugal mechanism 4 facing the first sheave 1. In this way, the torsion spring 9 can be installed very stably and reliably between the centrifugal mechanism 4 and the first sheave 1, thereby helping to provide a stable preset load, which is quite beneficial in ensuring and improving the performance of the governor assembly.

More specifically, the above-described accommodation portion 13 on the first sheave 1 may be provided to have two or more hole grooves arranged along the circumferential direction of the shaft 10, by way of example. The holes and grooves may be uniformly or non-uniformly arranged, and may be identical or different in shape, structural size, and the like. Any changes or modifications to the receptacle 13, for example, in terms of structural configuration, arrangement position, number, etc., are possible and permissible in the solution according to the invention.

Further, in an alternative case, it may be considered that a part or all of the first end 91 of the torsion spring 9 is configured to have an operation portion so that the first end 91 can be very conveniently and easily urged to be disengaged from the accommodating portion 13 by, for example, pulling up the operation portion after the first end 91 is placed in the accommodating portion 13.

By way of example only, as shown, for example, in fig. 5 and 7, the first end 91 may alternatively be configured to have two distinct sections, a first section 911 and a second section 912. These two sections will be placed in the housing 13 on the first sheave 1 and the outward projection of the second section 912 from the housing 13 can now be used as the above-mentioned operating part on the torsion spring 9, i.e. such an outward projection will help one to perform a pulling or the like operation on it in order to pull the first end 91 of the torsion spring 9 out of the housing 13, so that other operations can be performed subsequently, e.g. the first end 91 can instead be placed in another slot of the housing 13, or the torsion spring 9 can be detached from the shaft 10, etc.

With continued reference to fig. 7, in an alternative scenario, a structure such as a bore and slot serving as the receptacle 13 may be provided having a first portion 131 and a second portion 132, and these two portions may remain different from each other in the axial and/or radial direction of the mounting bore 12 (i.e., the shaft 10). For example, in the given example, the first portion 131 may be configured to be axially farther from the centrifugal mechanism 4 than the second portion 132, and radially closer to the central axis of the shaft 10 than the second portion 132, i.e. a stepped structure as shown in fig. 7 may be formed, which is very advantageous not only for allowing stable and reliable fixing and supporting of the torsion spring 9 from different orientations within a 360 ° circular range, but also for forming a cooperating operation with the above-mentioned operating portion on the torsion spring 9 for operating, e.g., displacing, the first end 91 of the torsion spring 9, thereby enabling flexible change and adjustment of the magnitude of the preset load provided thereby by adjusting the torsion angle of the torsion spring 9, e.g., in some applications, where some or some of the torsion springs 9 reach their own limit after being installed in torsion so as to have a considerable amount of spring pretension, it is even possible to make the torsion angle of some or some of the torsion springs 9 larger than 360, which is a technical advantage that is not at all possible with the existing tension spring approach.

It should be noted, of course, that the invention also allows to provide the housing 13 with three or more portions at the same time, as required, so as to provide, by means of the combined arrangement of these portions, a more abundant structural configuration, possibly more in line with the needs of certain practical applications.

In addition, the second end 92 of the torsion spring 9 may be alternatively configured to have an extension 921, the extension 921 may extend in a straight line form along the axial direction of the torsion spring 9, for example, and a part or the whole of it may be disposed in the receiving portion 43 of the centrifugal mechanism 4, for example, the receiving portion 43 may be disposed directly on the weight member 41 of the centrifugal mechanism 4. For example, as shown in fig. 6, the receiving portion 43 of the centrifugal mechanism 4 may be configured in any suitable configuration, such as a slotted hole, so that the extension 921 of the torsion spring 9 can be directly inserted into the receiving portion 43 to fixedly attach the second end 92 to the counterweight 41 of the centrifugal mechanism 4, and then the first end 91 of the torsion spring 9 can be flexibly mounted in the receiving portion 13 of the first sheave 1 or the position thereof in the receiving portion 13 can be freely adjusted as required by the application, as previously described.

In view of the above-mentioned technical advantages, the governor assembly according to the present invention is well suited for use in elevator safety systems and elevator systems to overcome the disadvantages and shortcomings of the prior art, including those described above.

For example, in another aspect of the present invention, an elevator safety system is provided, in which a governor assembly designed according to the present invention is disposed, that is, by providing such a governor assembly, it can be used to trigger a safety device in the elevator safety system when the elevator car is overspeed, so that the latter can perform safety processing such as speed limiting, braking, etc. on the overspeed condition of the elevator car, thereby realizing the function of safety protection for people, equipment, etc.

In addition, as a further aspect which is clearly superior to the prior art, the invention also provides an elevator system in which a speed limiter assembly provided according to the invention can be arranged, for example, on an elevator car in the elevator system, or at any other suitable location, so that in the event of an overspeed situation occurring when the elevator car is moving along guide rails in the elevator system, the safety gear in the elevator system can be triggered for safety handling by means of the above-mentioned speed limiter assembly, so that a timely and reliable safety measure is obtained, giving rise to these outstanding technical advantages of the invention compared with the prior art.

The governor assembly for an elevator system, the elevator safety system, and the elevator system according to the present invention have been set forth in detail above by way of example only, and these examples are provided only for the purpose of illustrating the principles of the present invention and its embodiments, not for the purpose of limiting the invention, and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, all equivalents are intended to be included within the scope of this invention and defined in the claims which follow.

Claims

1. A governor assembly for an elevator system, comprising:

a speed limiter; and

2. The governor assembly of claim 1, wherein the centrifugal mechanism is mounted on the sheave for rotation therewith by at least one shaft, and at least one torsion spring is mounted on at least one of the shafts and has first and second ends connected to the sheave and the centrifugal mechanism, respectively.

3. The governor assembly of claim 2, wherein the shaft is provided with two or more evenly arranged along a circumference of the sheave.

4. The governor assembly of claim 2, wherein the shaft is mounted on a side of the sheave facing the centrifugal mechanism and a receiving portion is provided at an outer peripheral region of the shaft for receiving the first end of the torsion spring; and/or

5. The governor assembly of claim 4, wherein the receptacle is configured as two or more bore slots arranged along a circumference of the shaft; and/or

6. The governor assembly of claim 5, wherein the orifice slot is configured to have at least a first portion and a second portion, the first portion being different from the second portion in an axial and/or radial direction of the shaft.

7. The governor assembly of claim 6, wherein the first portion is farther from the centrifugal mechanism in the axial direction than the second portion and closer to a central axis of the shaft in the radial direction than the second portion, and the first end is configured to have a first section received in the first portion and a second section, the operating portion being disposed on the second section and having an outwardly projecting portion after the second section is received in the second portion.

8. The governor assembly of claim 4, wherein the second end is configured with an extension extending along an axial direction of the torsion spring, and the receiving portion is configured as a bore for receiving at least a portion of the extension.

9. The governor assembly of claim 1, wherein the sheave and the safety device are mounted on the elevator car.

10. The governor assembly of claim 9, wherein the safety device is a safety gear pulling mechanism, and the linkage is configured in an arm shape and connected to the safety gear pulling mechanism.

11. An elevator safety system, comprising:

a governor assembly for an elevator system as defined in any of claims 1-10 arranged to trigger the safety when the car is over-speeding.

12. An elevator system, comprising:

a guide rail;

an elevator car moving along the guide rails; and

a governor assembly for an elevator system as defined in any of claims 1-10 arranged for triggering safety devices of an elevator for safety handling when the car is over-speed.